Someone please tell me .. What electrolysis is, And how electrolysis and displacement is used to extract metal

Question

I am really stuck on this question for my chemistry homework.
Please Help
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Answer 1

Example of electrolysis to prepare a metal: production of sodium from NaCl. Look in any inorganic text to see what happens.

Example of extraction by displacement: extraction of copper from copper sulfate mine washings using scrap iron. Look up reactivity series to see how that works.